Based on the historical population data for ZIP code 94509 in Antioch, California, the area has experienced consistent population growth and increasing population density over the past decade. The population increased from 57,708 in 2010 to 68,996 in 2022, while the population density rose from 2,859.66 people per square mile in 2010 to 3,419.03 people per square mile in 2022.

With a current population density of 3,419.03 people per square mile, ZIP code 94509 falls into the urban classification. Urban areas are characterized by multi-story residential buildings, commercial buildings, and high levels of infrastructure and services. The lifestyle in such areas is typically fast-paced, diverse, and culturally rich, suitable for individuals and families who enjoy vibrant city life with extensive public transport, restaurants, theaters, and museums.

The steady population growth and increasing population density suggest that Antioch has been experiencing ongoing urban development and densification over the past decade. This development likely involves the construction of new residential buildings, commercial spaces, and infrastructure improvements to accommodate the growing population.